[The Sunflower Family in the Cascade Mountains of Oregon and Washington]

Members of the Sunflower Family in the Cascade Mountains of Oregon and Washington with Discoid Flower Heads

(generally, ray flowers are lacking)

Snakeroot, Western Snakeroot, Western Boneset: Ageratina occidentalis

Western Boneset: Ageratina occidentalis

Snakeroot, Western Snakeroot, Western Boneset: Ageratina occidentalis (formerly Eupatorium occidentale) -

Trail Plant, Pathfinder: Adenocaulon bicolor -

Pearly Everlasting, Western Pearly Everlasting: Anaphalis margaritacea (Synonyms: Anaphalis margaritacea var. margaritacea, Anaphalis margaritacea var. occidentalis, Anaphalis margaritacea var. subalpina, Gnaphalium margaritaceum) -

Pussytoes: The Genus Antennaria -

Common Burdock: Arctium minus -

Arnicas: The Genus Arnica -

Mugworts and Wormwoods: The Genus Artemisia -

Silvercrowns: The Genus Cacaliopsis

Knapweeds: The Genus Centaurea -

Spotted Knapweed: Centaurea biebersteinii -

Diffuse Knapweed, Tumble Knapweed: Centaurea diffusa -

Black Knapweed: Centaurea nigra -

Dusty Maidens: The Genus Chaenactis -

Rabbit-brush: Chrysothamnus nauseosus -

Thistles: The Genus Cirsium -

Horseweed Conyza canadensis var. glabrata - Rays are present but tiny.

Daisies and Fleabanes: The Genus Erigeron -

Purple Cudweed: Gamochaeta ustulata -

Cudweeds: The Genus Gnaphalium microcephalum -

Oregon Goldenaster: Heterotheca oregona (Synonyms: Chrysopsis oregona, Chrysopsis oregona var. oregona, Chrysopsis oregona var. rudis, Heterotheca oregona var. oregona, Heterotheca oregona var. rudis) -

Silverback Luina and Silvercrown: The Genus Luina -

Disc Mayweed, Pineapple-weed: Matricaria discoidea (Synonyms: Camomilla discoidea, Chamomilla suaveolens, Matricaria matricarioides , Santolina suaveolens) -

Butterweeds and Groundsels: The Genus Packera

Sweet Coltsfoot: Petasites frigidus var. frigidus (Synonym: Petasites frigidus var. nivalis) -

Arctic Coltsfoot, Sweet Coltsfoot, Western Coltsfoot: Petasites frigidus var. palmatus (Synonyms: Petasites palmatus, Petasites speciosus) -

Raillardellas: The Genus Raillardella -

Rainiera, Tongue-leaved Luina, Tongue-leaf Luina: Rainiera stricta (formerly Luina stricta) -

Western Chocolate-cone: Rudbeckia occidentalis - ?

American Sawwort, American Saw-wort: Saussurea americana -

Butterweeds and Groundsels: The Genus Senecio -

Prickly Sow-thistle: Sonchus asper ssp. asper -

Common Sow-thistle: Sonchus oleraceus -

Common Tansy: Tanacetum vulgare -


Paul Slichter E-mail